Hey, this exercise is from my electronics exam (which i failed). My approach in finding a solution to these kinds of problems is to strategically pick out the KCL equations at the input nodes of each opamp. Since we can find the proper values of the voltages at the inputs, its all very straightforward. The thing is, i dont know how i should get the voltage at the inputs of opamp A2 (normally, i'd use superposition, but since we're working with controlled voltage sources...im at a dead end). My result is:

Another thing i found hard to determine was the voltage Vx. Since we dont have current flowing to the + input of the opamp, theres no voltage drop and Vx = K3V1...but what about the Vi source? should i use superposition to find Vx?

Sorry if these questions are stupid in some way...but i need to be sure of what im doing

Hey, the opamp is ideal, the resistors have all the same value R and the arguments for the controlled sources are listed on the top of the page. The objective is to get the voltage V0 at the central point of the circuit (this value should be a function of R and/or Vi).
This exercise is from an exam (we should actually be able to solve this and 2 more exercises similar to this one in 2 hours) and im studying for the next one, so i need to understand this.

We solve this exercises on paper, by inspection of the circuit. What we do is to get the equations for each sub-circuit that surround each opamp. after we determine the output voltage of each opamp we apply KCL on the central node. Since the resistors have the same value, you can easily reach the final solution.

To sum it all up, we use KCL as the main technique to solve this. What's hard about this is that it tests all your knowledge on analysing a complex circuit node by node...and theres where i need help. How can i approach a problem as complex as this one so i can easily solve it?

Tell me about it...thanks for the help...the results are a little bit different from mine, and i've spotted where i was wrong I'll be using this forum for help to study for the exam, so I'll be posting some more tricky exercises for u guys to help me...and just so u can see how mean my professors are :S